Key statistics
Satellite EXPLORER 1 at a glance.
Uptime
4441
Days in orbit
Revolutions
N/A
Per day
Orbit
LEO
Low Earth Orbit
Inclination
N/A
Latest
Satellite identification and parameters
Extended collection of information and parameters for EXPLORER 1.
Object identification
Object name: EXPLORER 1
International designator: 1958-001A
Object number (NORAD): 4
Object ID (CCSDS): 4
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
Orbital parameters
Decay date: March 31, 1970
Inclination: 33.15 deg
Period: 88.48 minutes
Apoapsis: 215.0 km
Periapsis: 183.0 km
Two-line elements (TLE)
No TLE available, as this satellite has decayed and is no longer in orbit.
Live tracking on map
Satellite EXPLORER 1 has decayed and is no longer in orbit. No tracking available.
Associated space launch
First successfully launched American satellite. It was the first spacecraft to detect the Van Allen Radiation Belt.
EXPLORER 1 was lifted into orbit during the mission ‘Juno-I | Explorer 1’, on board a Juno-I space rocket.
The launch took place on Feb. 1, 1958, 3:47 a.m. from Launch Complex 26A.
For more information about the launch, click the button.
Juno-I | Explorer 1
Agency: N/A
Status: Launch Successful
Launch date: Feb. 1, 1958, 3:47 a.m. UTC
Rocket: Juno-I
Launch pad: Launch Complex 26A
Location: Cape Canaveral SFS, FL, USA
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